struct S {

         std::string firstname;

         std::string secondname;

         int ID;

      bool operator < (S & b) {

       return ID < b.ID;

      }

 // 重新定义小于，因为默认的sort函数调用的操作符是<，所以我们只需要重载 < 就好了

};

int main(int argc, char* argv[])

{

 std::list<S> mylist;

 std::list<S>::iterator iter;

 S a;

 a.firstname ="dfadf";

 a.ID = ;

 mylist.push_back (a);

 a.firstname ="得到";

 a.ID = ;

 mylist.push_back (a);

 a.firstname ="xxx";

 a.ID = ;

 mylist.push_back (a);

 a.firstname ="gggg";

 a.ID = ;

 mylist.push_back (a);

 mylist.sort();

#include "stdafx.h"

#include <iostream>

#include <list>

using namespace std;

class A{

public:

    A(int m):a(m){}

    bool operator <(const A& other)

    {

    <span style="font-size: 18px;">    return a < other.a;</span>

    }

    friend std::ostream& operator <<(std::ostream& out, const A& obj){

        out<< obj.a<<endl;

        return out;

    }

private:

    int a;

};

int _tmain(int argc, _TCHAR* argv[])

{

   list<A> S;

   typedef list<A>::iterator it;

   S.push_back(A());

   S.push_back(A());

   S.push_back(A());

   S.sort();

    it it1 = S.begin();

    it it2 = S.end();

    while(it1 != it2)

    {

        cout<<*it1<<endl;

        it1++;

    }

    return ;

}

 // list_sort.cpp

 // compile with: /EHsc

 #include <list>

 #include <iostream>

 int main( )

 {

    using namespace std;

    list <int> c1;

    list <int>::iterator c1_Iter;

    c1.push_back(  );

    c1.push_back(  );

    c1.push_back(  );

    cout << "Before sorting: c1 =";

    for ( c1_Iter = c1.begin( ); c1_Iter != c1.end( ); c1_Iter++ )

       cout << " " << *c1_Iter;

    cout << endl;

    c1.sort( );

    cout << "After sorting c1 =";

    for ( c1_Iter = c1.begin( ); c1_Iter != c1.end( ); c1_Iter++ )

       cout << " " << *c1_Iter;

    cout << endl;

    c1.sort( greater<int>( ) );

    cout << "After sorting with 'greater than' operation, c1 =";

    for ( c1_Iter = c1.begin( ); c1_Iter != c1.end( ); c1_Iter++ )

       cout << " " << *c1_Iter;

    cout << endl;

 }